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Piston compressor

a piston compressor and crank pin technology, applied in the direction of pump components, positive displacement liquid engines, positive displacement engines, etc., can solve the problem that oil cannot be transferred from the crank pin to the piston,

Active Publication Date: 2005-06-09
DANFOSS COMPRESSORS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a piston compressor that is manufactured in an inexpensive manner. The shaft of the connecting rod is made as a sheet metal pipe, which is a relatively cheap material. The manufacturing process is cost-effective because it uses a sheet metal pipe instead of a more expensive casting process. The connecting rod can be easily adapted to different compressor sizes by adjusting the length of the pipes. The bearing shell is designed to allow for a spherical oil supply and has a screen to prevent oil from getting to the suction area of the piston compressor. The bearing shell is made in one piece and mounted on the crank pin from above, which keeps the costs low.

Problems solved by technology

With such a connecting rod, however, no oil can be transferred from the crank pin to the piston.

Method used

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Embodiment Construction

[0035]FIG. 1 shows a sectional view of a piston compressor 1. The piston compressor 1 has a cylinder 2, in which a piston 3 is arranged to be reciprocating. Via a cylinder head 4, only shown schematically, the piston 3 sucks refrigerant gas into a compression chamber during a suction stroke, and compresses this gas again during a pressure stroke. This procedure is known per se and will therefore not be explained in detail.

[0036] The movement of the piston 3 is controlled by a connecting rod 5. The connecting rod 5 has a shaft 6, which is formed as a sheet metal pipe. The sheet metal pipe may, for example, be made by drawing. It can be cut off from a semi-finished product. The sheet metal pipe surrounds a longitudinal channel 7. The diameter of the longitudinal channel 7 is substantially larger than the wall thickness of the sheet metal pipe, which forms the shaft 6. Accordingly, the shaft cannot only be manufactured in a cost-effective manner; it also has a low weight.

[0037] At th...

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Abstract

The invention concerns a piston compressor with a piston, which is connected with a crank pin of a drive shaft via a connecting rod having a longitudinal channel. It is endeavoured to make the manufacturing of a piston compressor cost effective. For this purpose, it is ensured that the shaft of the connecting rod is made as a sheet metal pipe.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This application is entitled to the benefit of and incorporates by reference essential subject matter disclosed in German Patent Application No. 103 56 397.0 filed on Dec. 3, 2003. FIELD OF THE INVENTION [0002] The invention concerns a piston compressor with a piston, which is connected with a crank pin of a drive shaft via a connecting rod having a longitudinal channel. BACKGROUND OF THE INVENTION [0003] Such a piston compressor, which is used for compressing refrigerant gas, is known from DE 100 53 575 C1. Oil flows periodically through the longitudinal channel from the drive shaft via the crank pin to a first bearing, with which the connecting rod is supported on the crank pin, and to a second bearing, with which the connecting rod is supported in the piston. [0004] A further piston compressor is known from U.S. Pat. No. 5,671,655. Here, the connecting rod is fixedly connected with a first connecting rod eye, which again engages with...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F04B39/00
CPCF04B39/0022
Inventor PETERSEN, CHRISTIANLASSEN, HEINZ OTTONOMMENSEN, MARTENIVERSEN, FRANK HOLM
Owner DANFOSS COMPRESSORS